[Update] 支持radius认证 (#2323)

* [Update] 支持radius认证

* [Update] 支持radius

* [Update] 增加requirements

* [Update] 修改copyright

* [Update] 修改migrations

apps/users/models/user.py

@@ -41,10 +41,12 @@ class User(AbstractUser):
     SOURCE_LOCAL = 'local'
     SOURCE_LDAP = 'ldap'
     SOURCE_OPENID = 'openid'
+    SOURCE_RADIUS = 'radius'
     SOURCE_CHOICES = (
         (SOURCE_LOCAL, 'Local'),
         (SOURCE_LDAP, 'LDAP/AD'),
         (SOURCE_OPENID, 'OpenID'),
+        (SOURCE_RADIUS, 'Radius'),
     )
     id = models.UUIDField(default=uuid.uuid4, primary_key=True)
     username = models.CharField(